Estimation of Sediment Yield in a Disaster Area by a Fired Forest

Choo, Tai Ho; Yoon, Hyeon Cheol; Noh, Hyun Suk; Ko, Hyun Soo

Journal of the Korean Society of Hazard Mitigation 2013;13(6):257-264.
Published online December 31, 2013.

산불재해지역의 토사유출량 산정

추태호, 윤현철, 노현석, 고현수

Estimation of Sediment Yield in a Disaster Area by a Fired Forest

Tai Ho Choo, Hyeon Cheol Yoon, Hyun Suk Noh, Hyun Soo Ko

Abstract

As exposure of soil surface arises from completely burned vegetation caused by forest fire, the secondary damage is likely to happen due to sediment runoff during heavy rains. In order to mitigate sediment disaster the various methods have been conducted such as erosion control, forestation project and so on. However, the dangerousness is generally ignored because sediment yield can not be estimated by quantitative analysis in forest fire region as well as neighborhood. In the current study, therefore, the sediment yield and soil loss amount were estimated by using the RUSLE(Revised universal soil loss equation) based on GIS in study area. Also, the potential areas of soil disaster were visually proposed by estimating the soil loss amount each rainfall frequency to apply and implement erosion control project.

Key Words: Soil Loss Amount; Sediment Yield; RUSLE(Revised universal soil loss equation); GIS; Forest Fire

요지

산불로 인한 식생 전소로 토사표면이 노출됨에 따라 집중호우 시 토사유출로 인한 2차적 피해가 발생할 가능성이 높다. 토사재해를 저감하기 위해 사방사업 및 조림사업 등 다양한 방법으로 접근하고 있으나, 산불지역은 물론 인근 지역의 토사유출량이 정량적인 수치로 산정되지 않아 지역주민은 물론 대외적으로 그 위험성을 체감하지 못하고 있다. 따라서 본 연구에서는 GIS를 활용한 RUSLE(개정범용토양손실공식)을 적용하여 대상지역의 토사유출량과 토양침식량을 산정하였다. 또한 빈도별로 탄력적인 사방사업을 시행하는데 적용할 수 있도록 강우빈도별 토양침식량을 산정하여 토사재해 잠재지역을 시각적으로 제시하였다.

핵심용어: 토양침식량; 토사유출량; 개정범용토양손실공식; 지형정보시스템; 산불